This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A000471 #17 Mar 04 2016 11:21:00
%S A000471 0,1,3,10,27,74,201,548,1490,4051,11013,29937,81377,221206,601302,
%T A000471 1634508,4443055,12077476,32829984,89241150,242582597,659407867,
%U A000471 1792456423,4872401723,13244561064,36002449668,97864804714,266024120300,723128532145,1965667148572
%N A000471 a(n) = floor(sinh(n)).
%H A000471 T. D. Noe, <a href="/A000471/b000471.txt">Table of n, a(n) for n = 0..200</a>
%F A000471 a(n) = floor(e^n/2). - _Bruno Berselli_, Mar 04 2016
%t A000471 Table[Floor[Sinh[n]], {n, 0, 50}] (* _Stefan Steinerberger_, Apr 15 2006 *)
%t A000471 Table[Floor[E^n/2], {n, 0, 30}] (* _Bruno Berselli_, Mar 04 2016 *)
%Y A000471 Cf. A000501, A001113.
%K A000471 nonn
%O A000471 0,3
%A A000471 _Simon Plouffe_
%E A000471 More terms from _Stefan Steinerberger_, Apr 15 2006